An article for laser marking can comprising: a thermoplastic composition comprising a thermoplastic polymer, an active component comprising at least one of a polymeric unit and an additive, wherein the thermoplastic polymer has a visible transmission of greater than or equal to 80% according to ASTM D1003-00, Procedure A, using D65 illumination, 10 degrees observer, and thickness of 1 mm; and a mark produced by chemical rearrangement of the active component generated by a laser of a first wavelength; wherein the mark exhibits at least one of: (i) a change in optical properties in the region 400 nm to 700 nm when exposed to light having a wavelength less than or equal to 500 nm; and (ii) a change in optical properties in the region of 400 nm to 700 nm when exposed to light having a wavelength greater than or equal to the first wavelength.

A printed game card, sheet or ticket set can incorporate multiple individual tickets separated by perforation, scoring or folds, for example. In various embodiments, the game card or sheet is printed with at least one playable game on each individual ticket, wherein the games can be instant win games with game indicia and one or more layers of varnish or rubber-based material that is removable to reveal the indicia. Each ticket on the game card, sheet or ticket set can include individual validation and/or activation indicia. The indicia can be human-readable and/or computer readable. Further, the entire game card, sheet or ticket set can include game or sheet activation indicia, such that when the entire sheet is sold, the entirety of individual game tickets can be activated simultaneously. When the individual game ticket validation codes are read, embodiments of the present invention can operate to individually assess whether the ticket is a winner, as well as whether the ticket has previously been redeemed.

A printed game card, sheet or ticket set can incorporate multiple individual tickets separated by perforation, scoring or folds, for example. In various embodiments, the game card or sheet is printed with at least one playable game on each individual ticket, wherein the games can be instant win games with game indicia and one or more layers of varnish or rubber-based material that is removable to reveal the indicia. Each ticket on the game card, sheet or ticket set can include individual validation and/or activation indicia. The indicia can be human-readable and/or computer readable. Further, the entire game card, sheet or ticket set can include game or sheet activation indicia, such that when the entire sheet is sold, the entirety of individual game tickets can be activated simultaneously. When the individual game ticket validation codes are read, embodiments of the present invention can operate to individually assess whether the ticket is a winner, as well as whether the ticket has previously been redeemed.

Information is written onto the surface of an object using both an optically identifiable pattern and subregions that exhibit differing magnetic properties. The optically identifiable pattern is printed onto a printed region on the surface of the object using a printing medium that contains magnetic particles. The printed region includes both a first subregion that exhibits a first prevailing magnetization direction and a second subregion that exhibits a second prevailing magnetization direction. The first magnetization direction differs from the second magnetization direction. The first and second magnetization directions are imparted to the first and second subregions by magnetic fields being applied to the magnetic particles. An edge between the first subregion and the second subregion does not coincide with any boundary of the optically identifiable pattern. The printed region contains both optically encoded information and magnetically encoded information. Additional information is decoded using both the optically and magnetically encoded information.

A printed game card, sheet or ticket set can incorporate multiple individual tickets separated by perforation, scoring or folds, for example. In various embodiments, the game card or sheet is printed with at least one playable game on each individual ticket, wherein the games can be instant win games with game indicia and one or more layers of varnish or rubber-based material that is removable to reveal the indicia. Each ticket on the game card, sheet or ticket set can include individual validation and/or activation indicia. The indicia can be human-readable and/or computer readable. Further, the entire game card, sheet or ticket set can include game or sheet activation indicia, such that when the entire sheet is sold, the entirety of individual game tickets can be activated simultaneously. When the individual game ticket validation codes are read, embodiments of the present invention can operate to individually assess whether the ticket is a winner, as well as whether the ticket has previously been redeemed.

An optical device comprising an at least substantially transparent substrate having a first side comprising a source layer having an arrangement of source elements and a second side comprising an Optically Variable Device (OVD) layer having a corresponding arrangement of diffractive elements, wherein each source element is configured to, upon illumination of the first side, provide an embedded light source for an associated diffraction element, and wherein the diffractive elements are configured for producing an optical effect observable when the diffractive elements are viewed by a viewer, such as the naked eye, upon illumination by the source elements.

A moir magnification device for authenticating security articles, the moir magnification device comprising: an array of micro focusing elements; and an array of micro images; wherein the array of micro focusing elements and the array of micro images are correspondingly aperiodic such that the micro focusing elements generate moir magnifications of the micro image when viewing the device at predetermined viewing angles. A device such as this raises the complexity and difficulty of the task facing would-be counterfeiters. The use of an aperiodic micro focusing element array and micro image array is not immediately apparent, as the moir magnifications observed by the viewer appear the same as that of a regular device with periodic arrays. In this way, the aperiodic aspect of the design remains covert until the moir device is more closely and deliberately analysed.

A printed game card, sheet or ticket set can incorporate multiple individual tickets separated by perforation, scoring or folds, for example. In various embodiments, the game card or sheet is printed with at least one playable game on each individual ticket, wherein the games can be instant win games with game indicia and one or more layers of varnish or rubber-based material that is removable to reveal the indicia. Each ticket on the game card, sheet or ticket set can include individual validation and/or activation indicia. The indicia can be human-readable and/or computer readable. Further, the entire game card, sheet or ticket set can include game or sheet activation indicia, such that when the entire sheet is sold, the entirety of individual game tickets can be activated simultaneously. When the individual game ticket validation codes are read, embodiments of the present invention can operate to individually assess whether the ticket is a winner, as well as whether the ticket has previously been redeemed.

An article for laser marking can comprising: a thermoplastic composition comprising a thermoplastic polymer, an active component comprising at least one of a polymeric unit and an additive, wherein the thermoplastic polymer has a visible transmission of greater than or equal to 80% according to ASTM D1003-00, Procedure A, using D65 illumination, 10 degrees observer, and thickness of 1 mm; and a mark produced by chemical rearrangement of the active component generated by a laser of a first wavelength; wherein the mark exhibits at least one of: (i) a change in optical properties in the region 400 nm to 700 nm when exposed to light having a wavelength less than or equal to 500 nm; and (ii) a change in optical properties in the region of 400 nm to 700 nm when exposed to light having a wavelength greater than or equal to the first wavelength.

A multilayered article for laser marking can comprise: a first layer having a visible transmission of greater than or equal to 80%; a second layer having a visible transmission of greater than or equal to 80%, and wherein the second layer comprises an active component that will form a laser mark with an L* of less than or equal to 40, when exposed to a laser light of a wavelength of greater than 800 nm; a third layer reflective to laser light having a wavelength greater than 800 nm, wherein the third layer has a visible transmission of greater than or equal to 80%; and optionally a substrate; wherein the article comprises a laser mark having an L* of less than or equal to 40 as measured according to CIELAB 1976 (specular included).